Meg runs a 10km race in 45 minutes (0.75 hours). What was her speed in kilometers per hour?

a. 22 km/hr

b. 7.5 km/hr

c. 4.5 km/hr

d. 13 km/hr

Which of Newton's Laws describes that a large massive body requires a large force to change speed quickly?

A ball is dropped from an 80-m tall building. neglecting air resistance, what will the speed of the ball be when it reaches the ground 4.0 seconds later?

Describe the forces on an object travelling at a constant speed?

The 25 kg wheel has a radius of gyration about its center O of kO = 300 mm. When the wheel is subjected to the couple moment, it slips as it rolls. Determine the angular acceleration of the wheel and the acceleration of the wheel's center O.

A duck with a mass of 0.90 kilograms flies at a rate of 12.0 m/s. What is the kinetic energy of the duck? 130 J 5.4 J 65 J 11 J

Archimedes tells us the lifting power of a balloon (how much mass it can lift) is equal to the difference between the mass of the balloon and the mass of the air it displaces.

What are the parts of a pendulum? Describe each part.

Why do space suits need to be pressurized?

Why do comets have tails?

The main characteristic of all vertebrates is the presence of a. cartilage b. a large brain c. a backbone d. an exoskeleton I got it. The answer was B